# -*- mode: python -*-
###
#
# (c) 2000-2007 Wijnand Modderman <wijnand at tehmaze dot com>
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# modification, are permitted provided that the following conditions are met:
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#     this list of conditions, and the following disclaimer.
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#     contributors to this software may be used to endorse or promote products
#     derived from this software without specific prior written consent.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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###

__revision__ = '$Hg: access.py,v 42004da20fdf 2007/01/01 17:22:50 +0100 $'

# system imports

# DDB imports
from ddb.log import log
from ddb.decorator import decorator

class AccessException(Exception):
    pass

# this is a decortor that allows you to specify access to the specified
# module module call

def access(globalFlags, localFlags):
    def call(proc, self, event, *args, **kwargs):
        access = [False, False]
        accessFlags = [[], []]
        local  = ':'.join([event.idx, event.target.lower()])
        # if no rights are set, access granted
        if not globalFlags and not localFlags:
            access = [True, True]
        # if local flags are set, if user matches these, allow
        if localFlags:
            accessFlags[1] = event.user.rights(local)
            if not accessFlags[1]:
                return
            for flag in accessFlags[1]:
                if flag in localFlags:
                    access[1] = True
        # if global flags are set, if user matches these, allow
        if globalFlags:
            accessFlags[0] = event.user.rights('*')
            if not accessFlags[0]:
                return
            for flag in accessFlags[0]:
                if flag in globalFlags:
                    access[0] = True
        if True in access:
            # update the event, set .access[global, local]
            event.access = access
            event.accessFlags = accessFlags
            print 'UFLAGS', accessFlags
            return proc(self, event, *args, **kwargs)
        else:
            raise AccessException, "access denied"
    return decorator(call)

# vim:ts=4:sw=4:et:
